CN101443247A - Transfer system, and transfer method - Google Patents

Abstract

In response to a transfer request, for which a loading time at a transfer source and a loading time at a transfer target are designated by a production controller, there is created a transfer scenario, which contains a basic transfer (From) from the transfer source to a buffer near the transfer target, for example, and a basic transfer (To) from the buffer to the transfer target. In order that the basic transfers (From, To) may be able to be executed, the buffer is reserved, and a transfer vehicle is allocated. The time period for the transfer vehicle to run to the transfer source or the buffer and the time period for the transfer vehicle to run from the transfer source or the buffer are estimated to assign a transfer command to the transfer vehicle. The possibility that the loading and the loading time may deviate from a designated period is evaluated; In case this possibility is high, a production controller is informed that a just-in-time transfer is difficult.

Description

Conveyer and transport method

Technical field

The present invention relates to a kind of travel conveyer of conveyance cars such as car, the track mounted jumbo that travels on the ground or unmanned conveyance car of bridge-type that uses, particularly make wait time in overside port or station side for minimum about carrying out loading or unloading in during appointment.

Background technology

Patent documentation 1 (day the disclosure 2001-296922 number), patent documentation 2 (day disclosure 2004-281622 number) have been put down in writing following content: prediction can be carried out the moment of the loading of article at overside port etc., and controls so that the conveyance car arrives overside port constantly at this.But only like this, the conveyance car can not arrive the overside port of unloading in the specified moment.Particularly under the long situation of the operating range till the conveyance destination, being difficult to correctly, forecasting institute needs running time.

Patent documentation 1: day disclosure 2001-296922 number

Patent documentation 2: day disclosure 2004-281622 number

Summary of the invention

Problem of the present invention is, can the specified moment with the overside port of article transport to the conveyance destination.

Other problems of the present invention are even under the situation of conveyance distance, also can specify constantly the overside port of article transport to the conveyance destination.

Other problems of the present invention are, by to via buffering carry out optimization, can specify constantly the overside port of article transport more reliably to the conveyance destination.

Other problems of the present invention are, even produce conveyance delay till the buffering or conveyance route various variables such as block up, also can specify constantly the overside port of article transport to the conveyance destination.

Whether other problems of the present invention are can judge rightly and can specify constantly the overside port of article transport to the conveyance destination.

The present invention is a kind of conveyer, possesses: a plurality of conveyance cars, conveyance article between a plurality of processing equipment; Buffering is used for taking care of the article of conveyance between processing equipment; And controller, conveyance instruction to conveyance car dispense articles, it is characterized in that, be provided with: conveyance instruction production unit, be used for having specified when the conveyance of the due in of the processing equipment of conveyance destination requires when producing, make from the processing equipment in conveyance source to relaying with the 1st conveyance instruction of buffering and from this relaying with the 2nd conveyance instruction of buffering to the processing equipment of above-mentioned conveyance destination; And allocation units, obtain the moment of travelling that is used to begin the conveyance car, and the conveyance car is distributed the 2nd conveyance instruction corresponding to this moment, so that article arrive the processing equipment of above-mentioned conveyance destination at above-mentioned specified due in.

And, the present invention is a kind of transport method, between a plurality of processing equipment by a plurality of conveyance car conveyance article, will be in buffering in the temporary transient keeping of the article of conveyance between the processing equipment, by the conveyance instruction of controller to conveyance car dispense articles, it is characterized in that, conveyance instruction production unit and allocation units are set in above-mentioned controller, above-mentioned conveyance instruction production unit, specified when the conveyance of the due in of the processing equipment of conveyance destination requires when generation, make from the processing equipment in conveyance source to relaying with the 1st conveyance instruction of buffering and from this relaying with the 2nd conveyance instruction of buffering to the processing equipment of above-mentioned conveyance destination; Above-mentioned allocation units are obtained the moment of travelling that is used to begin the conveyance car, and the conveyance car are distributed the 2nd conveyance instruction corresponding to this moment, so that article arrive the processing equipment of above-mentioned conveyance destination at above-mentioned specified due in.

In addition, the record about conveyer also is directly applied for transport method.

Preferably, running route along the conveyance car is provided with above-mentioned buffering in a plurality of positions, and above-mentioned conveyance instruction production unit will above-mentioned the 2nd conveyance be instructed to be divided into a plurality ofly and is made so that in a plurality of bufferings are carried out then with the processing equipment of article transport to the conveyance destination; Above-mentioned allocation units are obtained the moment of travelling of beginning conveyance car to each above-mentioned the 2nd conveyance instruction, and corresponding to the above-mentioned moment with each above-mentioned the 2nd conveyance command assignment to the conveyance car, so that article become article before the loading constantly of this relay buffer to the due in of each relay buffer, and article arrive the processing equipment of above-mentioned conveyance destination at above-mentioned specified due in.

And preferred, in a plurality of positions above-mentioned buffering is set along the running route of conveyance car, and which buffering is above-mentioned conveyance instruction production unit select as above-mentioned relay buffer according to predetermined condition.

The modification unit preferably is set, be used for according to the implementation status of above-mentioned the 1st conveyance instruction or the situation of conveyer, judge that can article arrive the processing equipment of above-mentioned conveyance destination at above-mentioned specified due in, and under the situation that can not arrive, revise above-mentioned the 2nd conveyance instruction.

The preferred setting: predicting unit, the moment and the distribution thereof that are used for article are arrived the processing equipment of above-mentioned conveyance destination are predicted; And evaluation unit, be used for the anticipated value of the deviation relative with the due in of having specified according to the due in and the distribution thereof of prediction is estimated, in above-mentioned conveyance instruction production unit, make above-mentioned the 2nd conveyance instruction, so that predetermined condition is satisfied in above-mentioned evaluation.

The effect of invention:

In the present invention, conveyance requires to be split into the 1st conveyance instruction and the 2nd conveyance instruction, give the conveyance car with the 2nd conveyance command assignment, so that the generation that requires from conveyance by relay buffer consumption is to the spacious and comfortable time till the due in of the processing equipment of conveyance destination, and specifying the processing equipment that reaches the conveyance destination constantly.For example, arrive relay buffer at the conveyance car, and arrive moment of the processing equipment of conveyance destination constantly in average appointment, when the conveyance car being distributed the 2nd conveyance when instruction, operating range or the running time etc. of the departing from of due in (variation) till by the processing equipment that is buffered to the conveyance destination from relaying determined.Relay buffer can be configured near the processing equipment of conveyance destination, therefore with from the conveyance source with one section ground conveyance of article compare to the situation of conveyance destination, can reduce departing from of due in, even produce congestion and other uncertain factors of running route, also can roughly correctly specify constantly the processing equipment of article transport to the conveyance destination.As a result, can move into article in the moment that the production system side requires, conveyer can provide high-quality service to production system.

Under the situation of conveyance distance, long-time custody articles are compared near the relay buffer with only using 2 conveyance cars the processing equipment of conveyance destination, use the conveyance car more than 3 sometimes and establish a plurality of relay buffers more efficient.In this case, when with article to the due in of each relay buffer before the loading constantly of the article of buffering, and article arrive the mode of the processing equipment of conveyance destination at specified due in, when each the 2nd conveyance instruction is obtained the moment of travelling of beginning conveyance car and given the conveyance car with each the 2nd conveyance command assignment, can make article reach final conveyance destination constantly specifying.And, change the moment from each relay buffer loaded with articles, in other words change the moment of travelling of beginning conveyance car, can absorb the variable during this.

Relay buffer is selected according to predetermined condition, for example select following buffering: short at operating range till the processing equipment of conveyance destination or running time, in other words near the upstream side of the processing equipment of conveyance destination, and be carved into according to the front and back till the loading constantly of the 2nd conveyance instruction from according to the unloading of the 1st conveyance instruction the time, can use the arrival of having expected the conveyance car depart from the time during.Thus, can reduce departing to the due in of the processing equipment of conveyance destination.

After the 1st conveyance instruction beginning, preferably before the 2nd conveyance instruction beginning, carry out to carry out on schedule the modification of the 2nd conveyance instruction, instruct and revise the 2nd conveyance, under extreme case, when instructing executory conveyance car to continue article transport by the 1st conveyance to the processing equipment of conveyance destination, even wait the factor that is difficult to predict for blocking up of running route, also can be by specifying the processing equipment that make article arrival conveyance destination constantly.

Be provided with: predicting unit, the moment and the distribution thereof that are used for article are arrived the processing equipment of conveyance destination are predicted; And evaluation unit, be used for to by the prediction due in and the anticipated value of the relative deviation of specified due in that distributes estimate, when in conveyance instruction production unit, making the 2nd conveyance instruction, so that estimate when satisfying predetermined condition, not only can make the anticipated value of due in constantly consistent, and the distribution of due in can be dropped on and specify near the constantly allowed band with appointment.

Description of drawings

Fig. 1 is the block diagram of control system of the conveyer of embodiment.

Fig. 2 is the planar view of layout of the transport device of expression embodiment.

Fig. 3 is the figure of " conveyance scheme (scenario) " among the explanation embodiment.

Fig. 4 is the figure from the control system of function aspects explanation embodiment.

Fig. 5 is the making of the conveyance scheme among the expression embodiment and the figure of modification order.

Fig. 6 is the figure of the management of the conveyance scheme among the expression embodiment.

Fig. 7 is the diagram of circuit of the making algorithm of the conveyance scheme among the expression embodiment.

Fig. 8 is the diagram of circuit of the deduction algorithm of the conveyance time among the expression embodiment.

Fig. 9 is the figure of data of the actual database of the conveyance time among the pattern ground expression embodiment.

Figure 10 be between the end-end (end-to-end) of expression among the embodiment running time on average and the diagram of circuit of the computational algorithm of variance.

Figure 11 is the diagram of circuit of the prediction algorithm of the prediction of the running time between the end-end of expression among the embodiment and variance.

Figure 12 is the diagram of circuit of the prediction algorithm of the prediction of the running time between later, the end-end of connector A of expression Figure 11 and variance.

Figure 13 be expression among the embodiment, with the figure of the example of the penalty function relative with respect to the error of the due in of designated duration.

Figure 14 be expression among the embodiment, to the figure of the arrival prediction evaluation constantly in conveyance source.

Figure 15 be expression among the embodiment, punctual (just in time) conveyance is switched to the figure of the algorithm of direct conveyance.

Figure 16 is the figure of the admin table of the buffering among the pattern ground expression embodiment.

Figure 17 is the figure of the search order of the empty buffer among the pattern ground expression embodiment.

Figure 18 is the diagram of circuit of joining the car algorithm among the expression embodiment.

Figure 19 is the figure that ride is counted admin table that joins among the pattern ground expression embodiment.

Figure 20 is the figure that joins car control among the pattern ground expression embodiment.

Figure 21 is the figure that has the situation of a plurality of destinations of travelling among the pattern ground expression embodiment in same segmentation (Bay).

Figure 22 be pattern be illustrated under the situation of Figure 21, the figure of the position relation of destination and conveyance car.

Figure 23 is the figure of the position of readiness of the conveyance car among the expression embodiment.

Nomenclature:

2 conveyers, 4 control system, 6 Production Controllers, 8 management departments

14 Data Management Departments of 12 cache management portions of 10 conveyance time deduction portions

20 conveyance scheme preparing department, 22 conveyance scheme configuration parts

24 conveyance schemes are carried out management department 26 and are joined car handling part 28 basic conveyance handling parts

Segment section route in 30 transport devices, the 32 medial section routes 34

35 processing equipment, 36 bridge-types car 38 buffering of travelling

40 conveyance schemes, 42,43 conveyance time real data

The actual database of 44 conveyance project management table 46 conveyance times

48 total buffer admin tables 50 are joined ride and are counted admin table

The specific embodiment

Below expression is used to implement most preferred embodiment of the present invention.

Embodiment

Fig. 1～Figure 23 is the conveyer 2 that example is represented embodiment with the bridge-type truck system that travels.In each figure, the 4th, control system communicates and receives the conveyance requirement with controller outside such as Production Controller 6, particularly under the situation that JIT (Just In Time: punctual) conveyance requires, specify loading or unloading during.Control system 4 is to the practice condition of Production Controller 6 report could carrying out JIT conveyance or conveyance instruction etc., can not carry out under the situation of JIT conveyance, Production Controller 6 requires identical conveyance as other conveyance requirement of preferentially conveyance or common conveyance etc., and carries out requirement again.

Management department 8 has conveyance time deduction portion 10, cache management portion 12 and Data Management Department 14.Conveyance time deduction portion 10 stores bridge-types and travels conveyance time of reality of car, and with point-between or unit between segmentation-segmentation etc. store its aviation value and standard deviation etc.And, for carrying out the inquiry of management department 24 from conveyance scheme preparing department 20 or conveyance scheme, the conveyance time infers portion 10 output and travels the current location of car to the inferred value of the running time of the loading point of the destination of travelling or break bulk point etc. and depart from the predictor of (distribution) from bridge-type, the for example standard deviation in the inferred value of the distribution of running time etc., and output for the evaluation number of the deviation of specified due in.Cache management portion manages in/empty situation buffering in the conveyer 2 or stocker etc., and for the conveyance instruction, particularly under the JIT conveying condition for basic conveyance, reservation buffering or stocker.Data Management Department 14 is data banks that the various data in the conveyer 2 are collected, analyze, managed, wherein, and with the data base administration conveyance time of conveyance time deduction portion 10.

Conveyance scheme preparing department 20 makes the conveyance scheme for the JIT conveyance.In addition, for preferential conveyance or the common conveyance beyond the JIT conveyance, the preparing department of conveyance instruction also can be set in addition and carry out management department, perhaps also common conveyance can be considered as specifying big time range to handle as the loading moment or unloading JIT conveyance constantly.And, also preferential conveyance can be considered as following JIT conveyance: loading constantly or unloading The faster the better constantly, along with the distribution that requires from conveyance, i.e. travel to bridge-type conveyance car indication such as car and distribute the elapsed time of conveyance instruction beginning, compensation merely to increase.Conveyance scheme in the JIT conveyance constitutes by the 1st conveyance instruction (basic conveyance From) till from the conveyance source to buffering with from the 2nd conveyance instruction (basic conveyance To) that is buffered to till the conveyance destination, when via buffering when increasing, the quantity of basic conveyance increases, under the constantly urgent situation of the appointment of unloading, become not direct conveyance via buffering.In each basic conveyance (basic conveyance To, basic conveyance From), by conveyance scheme preparing department 20 Production Times table.

Conveyance scheme configuration part 22 stores the conveyance scheme in advance, entrust and join car to joining car handling part 26 in view of the above so that empty bridge-type is travelled car at required time, be present in required place.And, the conveyance scheme that sets is carried out management department's 24 management implementation status by the conveyance scheme, and, break away from implementation status under the situation of time schedule of basic conveyance, carry out the modification of conveyance scheme, under opposite extreme situations, can not carry out the JIT conveyance and change to common conveyance etc., and give Production Controller 6 this advisory.In this case, also notify the up-to-date deduction moment of loading or unloading.Basic conveyance handling part 28 is in order to carry out basic conveyance, distributes the conveyance instruction at preset time to the bridge-type car that travels, and the shelf by the optimal buffering of cache management portion 12 reservations.

The bridge-type that transport device 30 possesses Fig. 2 travel car 36, buffering 38, medial section route 32 and interior segment section route 34, buffering 38 can be by bridge-type travel car 36 directly the handing-over article tops bufferings (OHB), also can be the buffering of route 32,34 bottoms, below be example with the top buffering.In addition, the bridge-type car 36 that travels is provided with the mechanism that the elevator (bay-lift) that is used in the handing-over article moves to the side under the running rail, makes them can be with respect to the top buffering handing-over article that are arranged on the running rail side.So, can not influence that the cloth of overside port etc. is local to be provided with a plurality of tops buffering, and the top buffering can be set in the position that is suitable for the JIT conveyance.And medial section route 32 and interior segment section route 34 are generically and collectively referred to as running route, are not having sometimes interior segment section route 34 to be called segmentation simply under the situation about misreading.Travel car 36 and buffering 38 of bridge-type is respectively arranged with a plurality ofly, and the buffering 38 of the amount of a plurality of article particularly is set in segment section route 34 or the medial section route 32 in each.

In addition, so-called reservation buffering is meant that the shelf to buffering carry out the reservation of the amount of 1 shelf.And, except that buffering, also can use and possess the stocker that windrow hoisting crane etc. goes out loading device, but because stocker is generally longer to the distance of the processing equipment of conveyance destination, and going out loading device needs opening time, therefore from stocker to the increase that departs from of handling running time till the device.Therefore, stocker is not suitable for the JIT conveyance, preferred buffering.In running route, for the fault that prevents running route or avoid blocking up etc., be provided with many shortcuts or bypass, a part of sheathing wireization, be used to follow the standby of joining car or surmount etc.The demonstration of Fig. 2 is oversimplified than actual.

A plurality of processing equipment 35 face inside segmentation routes 34 and being provided with, on processing equipment 35,1～a plurality of overside ports be arranged in segment section route 34 running rail below, article such as handing-over quartz conductor box travel between the car 36 in bridge-type.Processing equipment 35 comprises testing fixture etc., and conveyance source (representing with mark From in departure point) and conveyance destination (To represents with mark) that conveyance requires all are overside port in principle.Below, the term among the expression embodiment.

Table 1 term

Just In Time conveyance (JIT conveyance): in the loading in conveyance source or the conveyance that is determined to the fixed time of the unloading of conveyance destination; Fixed time is endowed the time (designated duration) of certain limit usually.

The conveyance scheme: the scheme (plan) that requires the conveyance of data for conveyance

Under the situation of JIT conveyance, constitute by the basic conveyance From till from the conveyance source to intermediate buffering and at least 2 steps being buffered to the basic conveyance To till the conveyance destination from the centre, the centre via buffering than the situation more than 1 under, the quantity of basic conveyance becomes bigger than 2.Can not carry out in the unit of conveyance of the sectionalization more than this in basic conveyance, comprise following process: conveyance garage sails to the overside port or the buffering (stocker) of loading point, freights, and unloads at the overside port of break bulk point or buffering, stocker.In addition, basic conveyance being divided under the situation about describing of travelling, can think that loading or unloading is the part of conveyance with conveyance.In this case, basic conveyance is divided into " travelling " of the sky of not being with article and handle 2 parts of " conveyance " of article.

Table 2 term (continuing)

The conveyance requirement: from the conveyance requirement of the article of conveyer controller outside such as Production Controller; The instruction to the conveyance car in the controller of relative therewith conveyer is the conveyance instruction, and the conveyance vehicle controller checks that the situation of carrying out of conveyance instruction is to follow the tracks of, and is the conveyance report from the conveyance vehicle controller to exterior controller reporting conveying condition.Conveyance requires to have 3 kinds of JIT conveyance requirement, preferential conveyance requirement and common conveyance requirement, but also can all be JIT conveyance requirement.

JIT conveyance requirement: in the loading in conveyance source or at least one side of the unloading of conveyance destination, have and specify constantly (during) the conveyance requirement; By realizing the JIT conveyance, the efficient of expectation semiconductor processing device etc. increases, and productivity improves.

Common conveyance requirement: do not have constantly and specify, be not endowed relative importance value or relative importance value and be the most the next conveyance requirement.

Preferential conveyance requirement: do not have the specific moment to specify, but be endowed, have precedence over common conveyance requirement than the most the next high relative importance value.Same uncertain execution sequence between JIT conveyance requirement and preferential conveyance requirement.When the moment that is required appointment by the JIT conveyance is urgent, make JIT conveyance requirement preferential, but when by JIT conveyance requirement appointment, be carved with when spacious and comfortable, make preferential conveyance requirement preferential.

Table 3 term (continuing)

Basic conveyance is handled: be used to implement the processing of the control system of basic conveyance, for example comprise:

Carry out the distribution of the conveyance car of specific basic conveyance to the indication of conveyance car

Decision is used for the running route retrieval and the correction thereof of the running route of basic conveyance

Conveyance car travelling till the overside port in conveyance source or the buffering

Loading at the article of the overside port in conveyance source or buffering

The conveyance car travels to the conveyance destination

Decision or change running route, the avoidance of blocking up to avoid running route to block up

Unloading at the article of conveyance destination

JIT realization rate: for JIT conveyance requirement, the at the appointed time ratio of conveyance success; By penalty function and with time difference of fixed time, the evaluation when departing from the fixed time.

Aviation value is judged: the aviation value according to the real data in past is judged the method that could carry out the JIT conveyance; Use the aviation value and the variance of real data in the past in an embodiment,, determine to carry out the JIT conveyance based on this evaluation by estimating the possibility that realizes the JIT conveyance with the convolution of penalty function.

Guarantee the judgement of precision regulation: the real data according to the past derives the realization possibility that could carry out the JIT conveyance, judges whether this possibility surpasses specific ratio.

Table 4 term (continuing)

Directly conveyance: not via the buffering, from the conveyance source to the direct conveyance of conveyance destination; With conveyance at the appointed time is condition, and directly conveyance also is the part of JIT conveyance.

The time schedule of basic conveyance: the time schedule of the various times in the basic conveyance; This time schedule comprises: the zero hour of basic conveyance (distributing to the conveyance car); Infer according to basic conveyance zero hour, to the conveyance car due in of conveyance destination; Inferred value in loading finish time in conveyance source; Inferred value to the conveyance car due in of conveyance destination; And at inferred value of unloading finish time of conveyance destination etc.In addition, conveyance source or conveyance destination comprise overside port or buffering.

Infer From constantly: from the deduction time till finishing to transport object loading of beginning of basic conveyance

Infer To constantly: from the deduction time till finishing to transport object unloading of beginning of basic conveyance

Deduction time-From, deduction time+From: from expected-(soon) ,+deduction time till the basic conveyance of the risk factors of (slowly) begins to finish to the loading at conveyance source X; Deduction time-To, deduction time+To define similarly.

Buffering: conveyer is temporarily deposited the device of article, comprises that broadly possessing windrow hoisting crane etc. goes out the stocker of loading device, sails the route setting, directly joins the buffering of article by the conveyance car but refer in principle follow.In buffering, that be arranged on the top abreast with running route is top buffering (OHB).

The conveyance car: bridge-type travel car or the rail road chassis that travels on the ground, the unmanned conveyance car that travels in railless ground etc. are sometimes referred to as chassis.

Effective conveyance car quantity: a certain moment can be distributed the platform number of conveyance car of the sky of basic conveyance, according to each fragmentation count.

Fig. 3 represents the implication of conveyance scheme 40.Conveyance requires to be made up of From data and To data, and these data all comprise the numbering of the overside port of processing equipment, group # or the ID and the arrival appointment moment etc. of article.For the conveyance requirement, in order to make the bridge-type conveyance car such as car that travels arrive in the conveyance source and specify constantly t1 to arrive conveyance source, conveyance car to arrive in the conveyance destination and specify constantly that t2 arrives the conveyance destination, so that the conveyance car distributes the conveyance instruction in the mode of specifying the conveyance of t1 arrival constantly source, and conveyance is to intermediate buffering, and so that the conveyance car for example distributes conveyances instruction to other conveyance cars in the mode that moment t2 arrives the conveyance destination.As a result, 1 conveyance requires to be divided into 2 parts of basic conveyance From and basic conveyance To, under the situation of centre via a plurality of bufferings, increases basic conveyance Int in the centre.According to above explanation as can be known, the target of JIT conveyance, with make the shortest comparing of conveyance time, be to make article not be trapped in the treatment facility side and make the treatment facility side wait for that the time of article is the shortest, even suppose that the conveyance time of each article is longer, as long as the wait time of treatment facility side is the shortest, then conveyer provides service to greatest extent for production system.And, arrive under the urgent situation of appointment moment t2 in the conveyance destination, carry out direct conveyance and get final product, in fact t1, t2 are used to having increased the designated duration of allowed band constantly.

When realizing the JIT conveyance, bottom line needs the conveyance car to arrive From or To position at moment t1, t2, and for this reason, prerequisite is the running time that can correctly infer the conveyance car.Therefore, the conveyance time deduction portion 10 of Fig. 1 is stored in the conveyance time real data 42,43 of Fig. 3 bottom in the data bank, these data for operating range or point-between, independent variable between segmentation-segmentation etc., return the distribution of actual value of running time or the statistic of its aviation value and standard deviation etc.

Fig. 4, Fig. 5 represent to be used to realize the function of JIT conveyance.Make symbol corresponding in the drawings, and expression realize the place (unit) of each function with Fig. 1.The conveyance scheme is made function and is realized by conveyance scheme preparing department 20, requires to judge whether to carry out the JIT conveyance for conveyance, cuts apart the conveyance requirement to basic conveyance under possible situation, and determines the buffering as relaying, determines the time schedule of each basic conveyance.

In the making of conveyance scheme,

(1) judgement could be carried out the JIT conveyance.According to the pattern that requires of JIT conveyance, carry out a, b, three kinds of judgements of c.

(a) judgement could be carried out the conveyance to the JIT in conveyance source

(b) judgement could be carried out the conveyance to the JIT of conveyance destination

(c) judge the JIT conveyance that to carry out to conveyance source and conveyance destination

(2) carry out to carry out the judgement of JIT conveyance by each of 3 kinds of option: a, b, c.

(a) aviation value is judged: the aviation value with the anticipation due in is judged

(b) guarantee that the precision regulation judges: whether satisfy the fixed time in order to the probability of appointment and judge

(c) based on the judgement of penalty function: determine penalty function, as with the function of the deviation in specified moment (early arrive, evening arrive), and with compensating whether be the value of appointment judge to get off

(3) in the allocation process function that the JIT conveyance requires, in each function of option: a, b, c, selected mode is handled.

(a) the relaying hop count is determined function: from option: selected mode i～iv

(i) right for whole conveyances source, conveyance destination set common value

(ii) according to the distance between conveyance source, the conveyance destination, capping value

(iii) according to requiring conveyance time, capping value to the conveyance destination

(iv) consider to the distance of conveyance destination and require conveyance time, capping value

In the conveyance destination is under the situation in a distant place, also can a plurality of bufferings of relaying, compare with the situation that relay buffer is fixed as 1, and can reduce departing to the due in of final conveyance destination.Under this situation, basic conveyance Int in the middle of increasing, and with before the loading of the buffering last basic conveyance constantly, to finish to the unloading of this buffering be condition, and similarly determine the conveyance time schedule of basic conveyance Int, so that before the loading constantly of each buffering, finish to the unloading of this buffering.

(b) the decision function of relay buffer: from option: selected mode i～v

(i) only consider that the distance to the conveyance destination decides

(ii) consider to decide to the conveyance time of conveyance destination

(iii) consider to decide to the distance and the conveyance time of conveyance destination

Consider that (iv) the load condition in the segmentation of the distance of conveyance destination and conveyance destination decides

(consider that v) the load condition in the segmentation of conveyance time of conveyance destination and conveyance destination decides

When relaying buffering when blocking up between conveyance destination or its, departing from of due in becomes significantly, therefore by utilize near the conveyance destination, the buffering of upstream side in for example same segment, reduce departing from of due in.

(c) the load condition arbitration functions in the segmentation: from option: i, ii, select a mode

(i) judge the load condition in the segmentation according to conveyance car quantity, average velociity in the segmentation

(ii) basis is judged the load condition in the segmentation based on the unloading in the segmentation of the anticipation time of the conveyance scheme of having made, loading conveyance car quantity

The judgement of the load condition in the segmentation is used for the deduction of conveyance time.

In conveyance scheme preparing department 20, preferably require also to make the conveyance scheme for preferential conveyance requirement or common conveyance beyond the JIT conveyance, and in the JIT conveyance, specified for the situation of the evaluation function (penalty function) of the deviation of specifying the time of advent under, also can make the conveyance scheme according to evaluation function.Therefore, conveyance scheme preparing department 20 also has following function.

(1) conveyance scheme is made (according to the kind that requires of JIT conveyance, can carry out 4 kinds of settings)

(a) scheme that requires for the conveyance of having specified to time of advent in conveyance source is made function

(b) scheme that requires for the conveyance of having specified to time of advent of conveyance destination is made function

(c) scheme that requires for the conveyance of having specified to time of advent of conveyance source and conveyance destination is made function

(d) scheme that requires for preferential conveyance is made function

(2) scheme manufacturing conditions decision function (selected mode from option: a, b)

(a) for specified with % with the allowed band that departs from of the time of advent and fixed time, for example with the probability of B% at the appointed time ± A second make function with scheme interior arrival etc., that conveyance requires

(b) for will with the deviation of the time of advent give for evaluation function, evaluation number be that the scheme that the conveyance below the value of appointment requires is made function

In the execution management department 24 of conveyance scheme, for executory conveyance scheme, the chaotic situation of observation conveyance time or driving path, and the deviation of the value of imagination when detecting observed value and making with scheme, and revise the conveyance scheme so that the correction deviation.The conveyance scheme is carried out management department 24 and is carried out conveyance scheme modifying function by basic conveyance handling part 28.Conveyance scheme modifying function possesses following function.

The deviation measuring ability of (1) conveyance scheme: selected mode from option: a, b

(a) according to for the % value of specified allowed band, detect the time of advent and with the deviation of fixed time

(b) according to the value that obtains by evaluation function, detect the time of advent and with the deviation of fixed time

(2) conveyance scheme modifying processing execution function: selected mode from option: a, b

(a) function of periodically termination that distributes, relaying hop count, relaying stocker, relaying total buffer, conveyance being made amendment the zero hour

(b) function that (when loading finishes, when arriving relaying stocker, relaying total buffer) makes amendment to the termination that distributes, relaying hop count, relaying total buffer, conveyance the zero hour when incident takes place

The modification of conveyance scheme is following function: according to the blocking up or cushion the state of the system of obstruction etc. of the delay of basic conveyance From, running route, carry out loading or unloading constantly specifying.

The execution management function of conveyance scheme also possesses the time set of distribution function.In distributing the time set function, subtend conveyance car distributes the time of conveyance instruction (basic conveyance) to set, and when the conveyance car obtains the branch timing, begins travelling to the loading point.This function comprises:

(a) require (From To data) with respect to the conveyance of having specified the JIT conveyance, set the function that requires the zero hour (distribution) to the conveyance in conveyance source,

(b), set the function that requires the zero hour from the conveyance of relaying stocker, relaying total buffer with respect to the conveyance requirement of having carried out conveyance to relaying stocker, relaying total buffer.

Because the conveyance car begins according to distribution immediately to the travelling of loading point in principle, so whether the conveyance car arrive preposition at predetermined instant, is by distributing control constantly to carry out.

The cache management function is realized by cache management portion 12, carries out the stifled situation of sky in the future of bufferings such as stocker, total buffer and infers, judges the utilizability of buffering, and is used for the making of conveyance scheme.And, be the buffering in relaying place for decision in the conveyance scheme, preengage between by the used life of conveyance scheme deduction.In the cache management function, not only current condition of service, moment of also the stifled situation of the sky of being scheduled to by the execution of the conveyance scheme of having made being changed are managed.Wherein, the content of cache management is sometimes according to revising in the having or not of dedicated buffering zone that the JIT conveyance requires to use.

The deduction function of conveyance time is realized by conveyance time deduction portion 10.In this function,, infer in the conveyance time of inferring time point according to current conveyance performance or conveyance performance in the past.This function possesses following key element.

(1) the conveyance time is inferred function: selected mode from option: a, b

(a) time is inferred the conveyance time as the input data

(from option: (i) ﹠amp; (iii), (i) ﹠amp; (iv), (ii) ﹠amp; (iii), (ii) ﹠amp; Selected mode (iv))

(i) divide intersegmental deduction: the typical value according to section unit is inferred

Infer (ii): infer between the destination point setting out

(iii) the full time section is inferred jointly: based on the deduction of full-time typical value

(iv) infer: based on the deduction of the typical value of the different time sections of appointment by different time sections

(b) distance and speed are inferred the conveyance time as the input data

(from option: (i) ﹠amp; (iii), (i) ﹠amp; (iv), (ii) ﹠amp; (iii), (ii) ﹠amp; Selected mode (iv))

(i) divide intersegmental deduction: the typical value according to section unit is inferred

Infer (ii): infer between the destination point setting out

(iii) the full time section is inferred jointly: based on the deduction of full-time typical value

(iv) infer: based on the deduction of the typical value of the different time sections of appointment by different time sections

At (a) (b) under the situation of any mode, all with output conveyance time and deviation thereof, for example standard deviation, and compare the mode that the weight of nearest real data increases with the real data of going, handle real data as weight distribution.

(2) the conveyance time infers with input data creating function: from option: selected mode a～c

(a) make according to the real data in past

(b) make according to the real data in past, data (the correction data of the jam situation of running route etc.) when the conveyance scheme is made

(c) according to the real data in past, when the conveyance scheme is made data and make based on the predicted data of conveyance scheme

In addition, based on the predicted data of conveyance scheme, be used for predicting the jam situation of running route etc. by the loading of carrying out in the future, the point and the moment of unloading are inferred.

Joining the car function is, implements to join the function of car according to conveyance scheme or the deduction of conveyance time in order to implement conveyance effectively, and it is realized by joining car handling part 26.This function comprises following key element:

(1) infers function according to the empty conveyance car of scheme

Be in order to implement conveyance effectively, and infer that according to the performed conveyance scheme of conveyer the conveyance car in current the use is the point and the function constantly of sky: will become empty conveyance car and be used to join car.

(a) infer that the conveyance car becomes the empty moment and point (or segmentation).For this reason, utilize the deduction function of conveyance time.

(b) join the enforcement function of car

(i) in joining car control, not with all the conveyance cars in travelling of unloading towards corresponding segment, all as the object of calculating of the effective conveyance car quantity that can distribute the conveyance instruction, in this function, be defined as and joining the car control cycle and promptly become the conveyance car that unloading finishes in the time cycle of joining car control unit.In addition, the conveyance car that unloading is finished, followed back in segmentation afterwards before joining the car control cycle becomes the object of joining car.

(ii) the conveyance in the future that will infer according to the conveyance scheme require to produce point and constantly, for example and constantly from the point of relay buffer loading, the conveyance car travelling with current conveyance since unloading finish to become empty point and constantly mate.Then, the conveyance car in travelling with current conveyance can be after unloading finishes travels with shortest distance or shortest time and requires to produce a little mode to conveyance, and above-mentioned point is appointed as the destination and join car of travelling after the end of unloading.

(2) conveyance according to scheme requires to produce the deduction function

Infer that according to conveyance scheme, particularly executory conveyance scheme conveyance in the future requires to produce the point and the moment, and join car, so that empty conveyance car is inferring that constantly arriving conveyance requires to produce a little.

(a) conveyance requires the deduction in the moment of generation

Use the set-up function of the distribution time in the making of conveyance scheme.

(b) join the enforcement of car

(i) from effective conveyance car quantity of during joining car control, calculating, deduct and joining the conveyance requested number that produces from corresponding segment in the car control cycle.Difference is actual effective conveyance car quantity, for this value is remained in the suitable scope, the conveyance car of surplus is joined car to the interior segment section route or the medial section route of effective conveyance car quantity not sufficient of reality, under the situation of effective conveyance car quantity not sufficient of reality, join car from other running route.

(ii) the conveyance in the future that will infer according to the conveyance scheme require to produce point and constantly, the conveyance car in travelling with current conveyance since unloading finish to become empty point and constantly mate, and join car, so that can be after unloading finishes requiring to produce to put to conveyance with shortest distance or shortest time, the conveyance car of current conveyance in travelling travel.

(3) all the conveyance time of conveyance requirement is inferred function

For the conveyance requirement of not making the conveyance scheme, infer the finish time of unloading by inferring the conveyance time, infer that the conveyance car finishes to become the empty point and the moment owing to unloading, implement to join car in advance.

(a) become in the deduction in the empty moment at the conveyance car, utilize the deduction function of conveyance time.

(b) join the enforcement of car

(i) in joining car control, be not with all the conveyance cars in travelling of unloading towards corresponding segment all as the object of calculating of effective conveyance car quantity, but be defined as the conveyance car of unloading end in joining the car control cycle.

(ii) the conveyance in the future that will infer according to the conveyance scheme require to produce point and constantly, the conveyance car in travelling with current conveyance since unloading finish to become empty point and constantly mate, and join car, so that can be after unloading finishes requiring to produce to put to conveyance with shortest distance or shortest time, the conveyance car of current conveyance in travelling travel.

Data management function is realized by Data Management Department 14, to being used to support the data of above-mentioned each function to collect, processing and managing.

The basic design of embodiment is described.

Time that the conveyance time is thought definitely or probability ground produces of inferring in will inferring in the conveyance time, and make the conveyance scheme, when producing and during the deviation of the time schedule of scheme etc., implementation modification and realize the JIT conveyance.

If exist setting relay buffer temporarily, and can realize the conveyance scheme of JIT conveyance during this buffering carried out then, then use this scheme according to the selection logical sequence of buffering.The conveyance scheme that if there is no can realize then changes relay buffer.

Be inferred as JIT conveyance realization at need, the common conveyance requirement that conveyance is in the past controlled as basis etc. is handled.Improve the success ratio of JIT conveyance thus.

According to the aviation value of the conveyance time that obtains by the actual value in past etc. and the distribution that variance is inferred the conveyance time, with variance as with arrive ahead of time or postpone relative risk factors.Make the conveyance scheme according to this guess value.

To (revising 1) before the arrival of the conveyance destination of basic conveyance From buffering and after the unloading to the buffering of basic conveyance From finishes (revising 2), carrying out the modification of conveyance scheme.

Revise 1: judgement is that supposition when making according to the conveyance scheme is by implementing conveyance, still switching to direct conveyance via relay buffer.

Revise 2:, change the execution time (distribution time) according to the relevant up-to-date conveyance time of inferring with basic conveyance To.

Above-mentioned basic design also can followingly be revised.

Being distributed as the basis and, making the time schedule in the conveyance scheme, and implement the modification of conveyance scheme with the conveyance time so that the compensation minimum is a prerequisite.By the distribution of the time of advent and the convolution of evaluation function (penalty function) etc., estimate compensation.

The realization difficulty of JIT conveyance is judged according to following situation: in the scope of selection logic of buffering, for relay buffer arbitrarily, the compensation anticipated value of conveyance source or conveyance destination is more than the predetermined value.

The time opening that basic conveyance is handled is to make to be compensated for as minimum Best Times on the basis of having considered the distribution of conveyance time.

So that conveyance source/destination is compensated for as the conveyance scheme that minimum mode determines, owing to stopping up, realizes under the situation of difficult relay buffer, use other relay buffer.

Fig. 6 represents the conveyance project management table 44 in the conveyance scheme execution management department 24.As mentioned above, the JIT conveyance requires for example to be broken down into 2 basic conveyances (FT11 among the figure, FT12 etc.), and will be stored in by the conveyance scheme that conveyance scheme preparing department 20 makes in the conveyance scheme execution management department 24.And the table that classification has been carried out in each basic conveyance in the zero hour (distribution time) is a conveyance project management table 44.The ID and the zero hour thereof of each basic conveyance of record, the implication of the zero hour is the moment that is recited as conveyance scheme 40 in Fig. 3 in table 44.

Fig. 7 represents the making algorithm of conveyance scheme.Accepted JIT conveyance requirement from Production Controller,, all specified due in for basic conveyance From and basic conveyance To at this.Only wherein under the appointed situation of a side, make the cooresponding conveyance scheme of JIT for this part and get final product.In addition, having under the situation of JIT conveyance for basic conveyance To appointment, the due in to relay buffer (relaying OHB) in basic conveyance From must be before the moment of relaying OHB loading.

The interim relaying OHB that sets in step 1, its be can be in the shortest time for the buffering of the overside port conveyance article of conveyance destination.In step 2, judge the realization of basic conveyance From.That is, judge that can the conveyance car be endowed under the situation of penalty function specifying the overside port that arrives the conveyance source constantly, whether the evaluation number of estimating in the penalty function is more than the predetermined value.For the overside port of conveyance destination etc., the standard deviation (risk factors) that can set the conveyance time is the relay buffer in the schedule time, and can carry out under the situation of basic conveyance From, sets the time schedule (step 3) of basic conveyance From.In time schedule, calculate the conveyance requirement and send constantly (to the distribution moment of conveyance car), with the evaluation number of penalty function be below the predetermined value, the conveyance car specifying the mode that arrives the conveyance source constantly to calculate this moment, and infers due in to relay buffer constantly according to this.Judge the realization of basic conveyance To in step 4, this is judged as, and the evaluation number of penalty function is that predetermined value is following, can the conveyance car specify the moment to be buffered to the overside port that reaches the conveyance destination from relaying.In addition, also can omit the evaluation of penalty function, and only infer the aviation value of due in.

Because far waiting apart from the overside port of conveyance destination, relay buffer substantially under the situation distributed more widely of the conveyance time of conveyance To, thinking that the evaluation number of penalty function is more than the predetermined value.In this case, revise the scheme that relay buffer also also changes basic conveyance From thereupon.Under the situation that basic conveyance To can realize, in step 5, set its time schedule, and, in relay buffer, freight the moment that should finish, the moment that the conveyance car should arrive relay buffer and the moment of tackling conveyance car distribution conveyance instruction and calculate the conveyance car according to specifying the situation that arrives the conveyance destination constantly to carry out inverse.Then in step 6, judge the term of execution of the conveyance scheme in, can use the relay buffer of interim setting in the time at needs, under unsve situation, return step 1 and revise relay buffer, and the later processing of repeating step 2.Storage finishes the making (step 7) of conveyance scheme by the above time schedule that obtains.

Fig. 8～Figure 12 represents the deduction algorithm of conveyance time.Basis as the deduction of conveyance time stores the data of its actual value, and stores in the data bank 46 of Fig. 9.The conveyance time has following 2 kinds: finish time till the loading in conveyance source from being assigned to of conveyance car; With distributing to the time after the conveyance of conveyance destination, till finish unloading.According to the conveyance Time Calculation average conveyance time that stores.Aviation value can be simple aviation value, but preferably is weighted on average in the mode of the proportion that increases nearest data.And base of calculation deviation etc. are as the distribution of conveyance time.The preferred too increase proportion relative in the calculating of standard deviation with nearest data.Then, obtain risk factors+r, the risk factors-r of the deviation of expression conveyance time according to standard deviation.Risk factors+r ,-r for example is standard deviation itself or its 2 times etc., under the situation that the distribution of the time of advent departs from from normal distribution, also can make risk factors-r that arrives ahead of time and the risk factors+r that postpones arrival is different values.Thus, as the inferred value of conveyance time, can access wherein between value and risk factors+r, risk factors-r.Processing in Fig. 9 pattern ground presentation graphs 8.

Figure 10 represent to collect travel moving velocity between the point of car data and calculate the aviation value of the running time between end-end and the example of variance (standard deviation).In step 10, collect the data of moving velocity between the point of each conveyance car, the running time between in step 11, calculating a little according to the distance between point and moving velocity.When moving velocity between postulated point and the moving velocity between other points are mutually independent, the aviation value and the variance of running time between in step 12, calculating a little, in step 13,, come running time and variance between future position by with the real data in past exponent smoothing or Kalman filtering as initial value.When putting a running time and variance respectively during addition, obtain the aviation value and the variance (step 14) of the running time the end-end till the loading destination or till etc. currently from the loading destination to the unloading destination from the conveyance car.

Under the situation relevant of the moving velocity between point with moving velocity between consecutive points, between in step 15, calculating some the aviation value of running time and and consecutive points between covariance, similarly running time and covariance between future position in step 16 are calculated the aviation value and the variance of the running time between end-end in step 17.

Figure 11, Figure 12 represent to make the cycle that data are classified be T and with the collection data in the period T be object, the aviation value of running time and the algorithm of variance between point.In step 20 from running time between each conveyance car bleeding point, in step 21 with the collection data in the period T be object and for each point and point to the running time of classifying.The data of classification have so been carried out in the upper right expression of Figure 11.Then, according to the right collection data of each point, calculate a little between the aviation value and the variance (step 22) of running time.Represent the data that obtain thus in the right stage casing of Figure 11.In step 23, for example come the aviation value of the running time in pre-direction finding conveyance source by exponent smoothing.The predictor of aviation value of the running time of some i in period T+1 and some j, by the predictor to the aviation value in the period T-1 multiply by factor alpha value, with the value that the actual mean value of some i in the period T and the running time between the j of place be multiply by (1-α), and come definite.The prediction example of representing the running time between point at this moment in the bottom right of Figure 11.

A transfers to Figure 12 according to connector, comes the variance of running time between future position by exponent smoothing.The predictor of the variance of some i in period T+1 and the running time of point between the j, by the predictor to the variance relative with period T multiply by factor alpha and the actual value of the variance in the period T be multiply by (1-α) value and determine.And the running time between can postulated point is differently independently (step 25) under the situation, according to the aviation value of the running time between point and the predictor of variance, can predict the aviation value and the variance of the running time between end-end.Represent the aviation value of running time and the prediction example of variance on the right side of Figure 12.

Figure 13 represent with for JIT conveyance requirement specified during loading finish or the example of the penalty function that the time difference of finishing of unloading is relative.It is 0 that penalty function has for example been finished under the situation of conveyance within the fixed period, compensation is corresponding to increasing with the time difference of designated duration, these compensation can be symmetrical under situation more Zao than designated duration or late situation also, but, for example increase compensation when in unloading when more late, with Zao situation, comparing than designated duration, when in loading, freighting, increase compensation than designated duration earlyly.But, be under the situation of unloading before the designated duration or freighting, the standby before overside port of conveyance car gets final product, and can not become the obstruction of JIT conveyance itself.The practical significance of the compensation of this moment is the compensation of the situation of blocking up to running route because the conveyance car stops.

Figure 14 represents to be used to estimate the calculating of evaluation number of the realizability of basic conveyance.As the right side of Figure 14, as the value of being given by penalty function g (t), when make empty conveyance car arrive the conveyance source the moment be distributed as fli (t) (for example normal distribution of inferring) according to risk factors the time, can obtain evaluation number C1 (T) according to convolution.And if exist evaluation number C1 (T) to be the following conveyance car of predetermined value, then basic conveyance From can realize.In addition, have at the conveyance car that can use under many situation, each conveyance car is obtained evaluation number, and the conveyance car of evaluation number minimum is distributed basic conveyance From.In Figure 14, calculated evaluation number, but similarly calculated unloading evaluation number constantly in the conveyance destination to the due in conveyance source.In the evaluation of compensation, for example also can use the evaluation number of arrive inferring among τ+r, the τ-r constantly (+r ,-r is risk factors) and g (τ+r)+g (τ-r).

Carry out in the management department 24 in the conveyance scheme of Fig. 1, before basic conveyance From finishes, be to carry out basic conveyance To in addition, still switch to the judgement of direct conveyance, even the unexpected incident outside blocking up for running route also can realize the JIT conveyance.Figure 15 represents the handoff algorithms to direct conveyance.The situation that affirmation begins the conveyance of basic conveyance To after the finish time of basic conveyance From in step 30, at it is under the situation of "Yes", confirms in step 31 after basic conveyance From finishes, relay buffer is empty situation till freight in basic conveyance To.Arbitrary step in step 30 and step 31 is under the situation of "No", switches to direct conveyance (step 32).In this case, the basic executory conveyance car of conveyance From continues to drive to the unloading destination of basic conveyance To, and is specifying the moment to unload.In that the evaluation number of Figure 14 is under the situation more than the predetermined value because the conveyance car arrives the unloading destination before specifying constantly, carry out following processing: make according to the standby of predetermined value before the unloading destination, change by running route to postpone the time of advent etc.And, even switch to direct conveyance, under the evaluation number of the time of advent to the unloading destination is situation more than the predetermined value, also can not carries out the advisory of JIT conveyance and give Production Controller.And, in step 33, reset the time schedule of basic conveyance To according to latest development.In these are handled, use the empty situation of the inferred from input data buffering of cache management portion, and utilize the data of conveyance time deduction portion to infer the up-to-date conveyance time.

Figure 16 represents the example of total buffer admin table 48, under the situation of using total buffer buffering in addition, for these bufferings identical admin table is set also.In Figure 16, current time is t2, and the later data of t3 are predictor.Table is by being distinguished according to the shelf of each buffering, and the ID that requires of the conveyance during each shelf record used or be the ID of empty situation and the reservation conveyance requirement of using buffering.

Figure 17 represents the searching algorithm of relay buffer of the conveyance destination 39 of internal segment section route 34.The bridge-type car that travels carries out the current reversion that follows of a side and sails on running route 32,34, and freely enters between medial section route 32 and the interior segment section route 34.Therefore, for the overside port 39 of conveyance destination by from its positive upstream side to the order of upstream side more, the empty buffering of search in same segment (use the schedule time during be the buffering of sky), when not obtaining suitable empty buffer, the upstream side of segment section the route 34 and empty buffer of middle segmentation route 32 searched in certain of conveyance destination 39.

Figure 18, Figure 19 represent the fitted out vehicles amount admin table 50 of joining car algorithm and use among the embodiment.According to the time schedule of basic conveyance, grasp each constantly, in each segmentation, should be assigned with the quantity of the conveyance car of conveyance instruction.But also grasp the quantity (step 40) of in each segmentation, finishing unloading, becoming empty chassis.No matter basic conveyance and conveyance in the past in step 41 are inferred at a time, the platform number and the due in of the needed chassis of freighting in segmentation.And, for example infer before this moment etc., in identical segmentation because unloading becomes the platform number (step 42) of the chassis of sky.In addition, Shi Ke unit is to join the cycle of car or the deduction of conveyance time etc.During the aggregate-value of the chassis of freighting when difference from the aggregate-value of the platform number that becomes empty chassis, in segmentation, can freely distribute the platform number of the conveyance car that conveyance instructs definite, and so that the mode of this number in preset range joined car (step 43).

Under the situation of Figure 19, for each upper left segmentation and for each moment, the platform number of the chassis that prediction arrives for loading, and prediction unloads constantly in each upper right segmentation, at each and finishes and become the platform number of empty chassis, according to these difference predictions each constantly, can be assigned with the platform number (effectively conveyance car quantity) of the empty chassis of conveyance instruction in each segmentation.Under in effective conveyance car quantity not sufficient predetermined value, for example for negative situation,, surpass under the situation of predetermined value, make the conveyance car transfer to other segmentations at effective conveyance car to the conveyance car of minute segment call sky.

Figure 20 represents to join the car algorithm among the embodiment for 1 segmentation.At this, establishing car control cycle T for example is 5 seconds, has empty chassis 1, empty chassis 2 these two empty chassis at current time, prepare from now 15 seconds～20 seconds moment before 2 cycles for example needed chassis join car.Because in 10 seconds～15 seconds moment in ensuing cycle, needing 1 empty chassis in the conveyance 2 substantially, so empty chassis 1 is assigned to this.Because at the moment 15～20 seconds other 1 empty chassis of needs, so empty chassis 2 is assigned to this, because basic conveyance 1 is finished and producing 1 empty chassis in segmentation in same period, so the effective conveyance car quantity 15 seconds～20 seconds moment is the basic conveyance 3=1 of the empty chassis 2-of basic conveyance 1+, for this value is remained in the proper range, and implement the conveyance car of surplus is evicted from other segmentations etc. or called in not enough conveyance car from other segmentations etc.At this, represented to be used for the management of effective conveyance car quantity of JIT conveyance, but for becoming the empty moment owing to unloading and for loading needs all conveyances that the moment of empty chassis predicts to the conveyance car, can both be in advance by joining car control preparation conveyance car.And, under the situation that can not predict the moment that the conveyance car is freighted, for the conveyance instruction that has distributed, can predict that also the conveyance car is owing to unloading becomes the empty moment, under the more situation of the platform number of the empty chassis that in control cycle, in certain segmentation, produces, can evict the empty chassis of generation from, under less situation, can carry out from the empty chassis of other minutes segment call.

The allocation order of conveyance instructions such as Figure 21,22 is illustrated in when having a plurality of destination in the same segmentation, basic conveyance instruction.The destination is point of freighting or the point of unloading, and Figure 21, Figure 22 represent destination 51～53 for example.And, when car 54～56 that the bridge-type of Figure 22 is travelled distributes the conveyance instruction, do not block up in order on interior segment section route 34, not cause, and in interior segment section route 34, distribute the bridge-type in the downstreams car 54 that travels in advance to the destination 51 in downstream, bridge-type in the middle of the destination 52 of centre the is distributed car 55 that travels, upstream the point of destination 53 of side distributes the bridge-type of the upstream sides car 56 that travels.And, when the inferred value of the running time till being set to each point is τ 1 ± r1, τ 2 ± r2, τ 3 ± r3, under the situation of the designated value that has due in, when the car 54～56 of travelling to bridge-type distributes the conveyances instruction, begin under the situation of travelling of point of destination 51～53 immediately, constantly add that the value of τ 1, τ 2, τ 3 and its distribution ± r1～r3 need satisfy predetermined condition to distributing.

The example of the position of readiness when Figure 23 represents to join car, at this, interior segment section route 34 is multiple line, by forming towards parallel 2 running rails 60,61 to identical.When joining car so that bridge-type is travelled car 36 with the running rail 61 of overside port 64 opposition sides that are arranged on processing equipment 62,63 on during standby, can not stop up running rail 60 and become other bridge-types obstacle of car when overside port 64 carries out loading or unloading that travel.

In an embodiment, be illustrated, but also can have important segmentation or unessential segmentation or have important processing equipment and unessential processing equipment with each processing equipment or the mode that respectively is segmented into equity.In this case, the scheme of preferentially making the JIT conveyance for important processing equipment or segmentation.

When joining car, need to predict the quantity of the empty chassis that in segmentation, produces.Represented to predict the travel situation of quantity of car of the bridge-type of car in the cycle of joining according to the quantity of executory conveyance instruction, but also can obtain the travel quantity of car of the bridge-type that is present in the segmentation more simply, perhaps as its approximate value, obtain the point in the segmentation as being the quantity of the executory conveyance instruction of From position or To position or the quantity that the point in the segmentation is instructed as the executory conveyance of To position.

Claims (6)

1, a kind of conveyer possesses: a plurality of conveyance cars, conveyance article between a plurality of processing equipment; Buffering is used for taking care of the article of conveyance between processing equipment; And controller, the conveyance instruction to conveyance car dispense articles is characterized in that, is provided with:

Conveyance instruction production unit, be used for having specified when the conveyance of the due in of the processing equipment of conveyance destination requires when producing, make the 1st conveyance instruction of the buffering of using to relaying from the processing equipment in conveyance source and the buffering used from this relaying to the 2nd conveyance instruction of the processing equipment of above-mentioned conveyance destination; And

Allocation units are used to obtain moment of the beginning of travelling that is used to make the conveyance car, and distribute the 2nd conveyance to instruct to the conveyance car according to this moment, so that article arrive the processing equipment of above-mentioned conveyance destination at the due in of above-mentioned appointment.

2, conveyer as claimed in claim 1 is characterized in that,

Above-mentioned buffering is set along the running route of conveyance car and in a plurality of positions, and above-mentioned conveyance instruction production unit will above-mentioned the 2nd conveyance instructs to be divided into and makes a plurality ofly so that article via a plurality of relay buffers by the processing equipment of conveyance to the conveyance destination,

Above-mentioned allocation units, obtain the moment of the beginning of travelling that makes the conveyance car for each above-mentioned the 2nd conveyance instruction, and the conveyance car is distributed each above-mentioned the 2nd conveyance instruction according to the above-mentioned moment, so that article to the due in of each relay buffer at article before the loading constantly of this relay buffer, and article arrive the processing equipment of above-mentioned conveyance destination at the due in of above-mentioned appointment.

3, conveyer as claimed in claim 1 is characterized in that,

Above-mentioned buffering is set along the running route of conveyance car and in a plurality of positions, and which buffering is above-mentioned conveyance instruction production unit select as above-mentioned relay buffer according to predetermined condition.

4, conveyer as claimed in claim 1 is characterized in that,

Be provided with the modification unit, this modification unit is used for according to the implementation status of above-mentioned the 1st conveyance instruction or the situation of conveyer, judge that can article arrive the processing equipment of above-mentioned conveyance destination at above-mentioned due in of having specified, and under the situation that can not arrive, revise above-mentioned the 2nd conveyance instruction.

5, conveyer as claimed in claim 1 is characterized in that,

Be provided with:

Predicting unit, the moment and the distribution thereof that are used for article are arrived the processing equipment of above-mentioned conveyance destination are predicted; With

Evaluation unit is used for the anticipated value of the deviation relative with the due in of having specified according to the due in and the distribution thereof of prediction is estimated,

In above-mentioned conveyance instruction production unit, the mode that above commentary valency satisfies predetermined condition is made above-mentioned the 2nd conveyance instruction.

6, a kind of transport method by a plurality of conveyance cars conveyance article between a plurality of processing equipment, will by the conveyance instruction of controller to conveyance car dispense articles, is characterized in that in the temporary transient keeping of the article of conveyance between the processing equipment in buffering,

Above-mentioned controller is provided with conveyance instruction production unit and allocation units,

In above-mentioned conveyance instruction production unit, when generation has been specified when the conveyance of the due in of the processing equipment of conveyance destination requires, the 1st conveyance instruction of the buffering that making is used to relaying from the processing equipment in conveyance source and the buffering used from this relaying are to the 2nd conveyance instruction of the processing equipment of above-mentioned conveyance destination

In above-mentioned allocation units, obtain the moment of the beginning of travelling that is used to make the conveyance car, and distribute the 2nd conveyance to instruct to the conveyance car according to this moment, so that article arrive the processing equipment of above-mentioned conveyance destination at above-mentioned due in of having specified.

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